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Description
Optical Variable Attenuator EVA50-80Most compact and rugged portable attenuator on the market Three wavelengths: 1310nm 1490nm 1550nm Different attenuator range, 40dB, 60dB or 80dB Can save current value as reference Can save 10 tracks attenuation value Memorize the value after instruments shut down Energy save mode One year warranty and Three year recommended calibration interval Model EVA50 40 EVA50 60 EVA50 80 Attenuating Range 40 dB (SM) 60 dB (SM) 80 dB (SM) Calibrated Wavelengths
Most compact and rugged portable attenuator on the market
Three wavelengths: 1310nm / 1490nm / 1550nm
Different attenuator range, 40dB, 60dB or 80dB
Can save current value as reference
Can save 10 tracks attenuation value
Memorize the value after instruments shut down
Energy save mode
One-year warranty and Three-year recommended calibration interval
| Model | EVA50-40 | EVA50-60 | EVA50-80 |
| Attenuating Range | 40 dB (SM) | 60 dB (SM) | 80 dB (SM) |
| Calibrated Wavelengths | 1310nm / 1490nm / 1550nm | ||
| Fiber Mode | SM | ||
| Attenuating Mode | Digital | ||
| Display Resolving Power | 0.1dB | ||
| Display | LCD, 128*64 | ||
| Max Input Power | + 21 dBm | ||
| Return Loss* | 40 dB | ||
| Insertion Loss* | 2.5 dB | ||
| Connector | FC/PC (or customize) | ||
| Uncertainty | ± 0.5 dB | ||
| Repeatability* | ± 0.2 dB | ||
| RS-232 | Optional | ||
| Auto Power Off | No operation in 10 minutes (can be canceled), Low battery energy | ||
| Battery Charge | Yes | ||
| Operate Time | Above 20 hours | ||
| Power Supply | 3 * AA batteries or AC/DC adapter | ||
* at 20±3℃, CW, with FC/PC connector,1550nm
| Size(H*W*D) | 190mm * 90mm * 40mm | |
| Weight/td> | About 450g | |
| Storage Temperature | -20 -- +60°C, < 90%RH | |
| Operating Temperature | -10 -- +50°C, < 90%RH | |
EVA50-XX
Model
EVA50-40 = 40dB
EVA50-60 = 60dB
EVA50-80 = 80dB
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 20 reviews
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Product Reviews
★★★★★ 4
Good quality, but a few issues with the hidden mounts and levelness.
Size: 35x7 2Pcs, Color: Black, Size: 35x7 2Pcs, Color: Black
These are quite nice and also sturdy. Only complaint I have is that I bought a couple of these, and on one of them, only one of them, it was difficult to get the hidden mounts to go into the holes. I think it was probably a manufacturing defect thing. Also, on that particular one, it wasnt as level as the other. Not a show stopper, but if you need a perfectly level type of mounting situation, I would be careful here.
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Reviewed in the United States on September 14, 2025
★★★★★ 5
Great value/easy to install.
Size: 24x6 2Pcs, Color: Black, Size: 24x6 2Pcs, Color: Black
Great product and great value. Easy to install and adds a nice touch to a bathroom.
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Reviewed in the United States on March 21, 2026
★★★★★ 5
Easy hanging
Size: 31x7 2Pcs, Color: Black
Great size and easy to hang. Have purchased many for my home.
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Reviewed in the United States on May 20, 2026
★★★★★ 5
Look great!
Size: 40x7 2Pcs, Color: Black
Love the way these turned out in my office! I connected 3 shelves in a row across the wall to make one long shelf and it looks great!
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Reviewed in the United States on April 16, 2026
★★★★★ 3
Nice looking. Not very sturdy. Easy to install.
Size: 40x7 2Pcs, Color: White, Size: 40x7 2Pcs, Color: White
Update: The shelf slopes at about a 45° angle when you put anything more than about a pound on the outside edge of it. Perfectly fine up against the wall. Just seems like the braces inside aren't long enough to really give the stability needed. Bracket is nice and tight against the wall. Had to add braces underneath to hold a small plant, a photo and a small container. Wa sloping more and more each week
The shelves look great and we're pretty easy to install. They have a single bracket that is very easy to mount to the wall and get nice and level..
The downside is that the bracket isn't long enough to go between studs. This seems like a pretty simple oversight. I mean why wouldn't you make it long enough to go stud to stud?
Secondly and maybe more fatally the bars that go inside the shelf to support them coming out from the wall are significantly shorter than the depth of the shelf. Unfortunately this means the shelf is only supported the first few inches coming out from the wall so there is the potential for a slight lean forward..
The anchors they send are trash. Cheap soft plastic that just tears and bends with a screwdriver. I would suggest spending $2 and grabbing your own anchors from Ace or home Depot.
The shelves are essentially made of a high grade cardboard kind of wood. They are not going to support much weight or last for years and years however there incredibly affordable and look nice and easy to install. Long as your expectations are right you'll be happy.
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Reviewed in the United States on October 23, 2023
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